DYN-7162 Add back missing node help docs and fix cases were not working

[QilongTang]

Purpose

Per Slack conversation, team finished a round of internal checking on nodes missing help content. In this PR, I am adding back missing dyns that I could validate which were missing.

Also fixed image display for the following nodes:

• DSCore.Math.Random(value1, value2, seed)
• DSCore.Math.RandomList(amount, value1, value2, seed)
• DSCore.Math.Abs(number)
• DynamoUnits.Quantity.ByTypeID

Added copy step for excel sheets in help docs

• CoreNodeModels.Input.CustomSelection.dyn added by @twastvedt It looks like the dyn file was missing from original PR: AGD-2199 - custom dropdown node #11958)

Node with issue

• OpenXML nodes, excel sheets will always come with path problem

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

Add back missing node help docs so that customer could see in product help

Reviewers

@DynamoDS/dynamo

FYIs

(FILL ME IN, Optional) Names of anyone else you wish to be notified of

[github-actions]

See the ticket for this pull request: https://jira.autodesk.com/browse/DYN-7162

[github-actions]

UI Smoke Tests

Test: success. 3 passed, 0 failed.
TestComplete Test Result
Workflow Run: UI Smoke Tests
Check: UI Smoke Tests - net8.0

[twastvedt]

FYI: @twastvedt It looks like the dyn file was missing from original PR

Added, @QilongTang !

[QilongTang]

FYI: @twastvedt It looks like the dyn file was missing from original PR

Added, @QilongTang !

Awesome, thanks!

[QilongTang]

SelfServe job interrupted, restarted at https://master-5.jenkins.autodesk.com/job/Dynamo/job/DynamoSelfServe/job/pullRequestValidation/16229/

[RobertGlobant20]

LGTM

[RobertGlobant20]

I guess you tested this one and is showing the documentation correctly, right?

[QilongTang]

Yeah, I was using the VSCode md preview and it worked after the change

[QilongTang]

It was passing last night on https://master-5.jenkins.autodesk.com/job/Dynamo/job/DynamoSelfServe/job/pullRequestValidation/16225/, the CI seems to be down today so merging for now and FYI @sm6srw